Adaptive eigen-projection beamforming algorithms for 1D and 2D antenna arrays

Author

Foutz, Jeffrey ; Spanias, Andreas ; Bellofiore, Salvatore ; Balanis, Constantine A.

Author_Institution

Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ, USA

Volume

2

Issue

1

fYear

2003

fDate

6/25/1905 12:00:00 AM

Firstpage

62

Lastpage

65

Abstract

We develop one-dimensional (1D) and two-dimensional (2D) adaptive algorithms that use gradient projections in selected subspaces for use in antenna beamforming. The 1D algorithm is essentially a significantly enhanced version of an eigenspace projection algorithm (EPA) that was previously developed for controls. The 2D algorithm is new and is based on a stacked configuration of the enhanced 1D algorithm. Both algorithms are applied to antenna beamforming in uniform linear and planar arrays. Simulation results show faster convergence as well as improved beam properties. In addition, results for a more realistic scenario, with a BPSK signal and antenna coupling effects, are also quite promising.

Keywords

adaptive antenna arrays; antenna radiation patterns; array signal processing; convergence of numerical methods; eigenvalues and eigenfunctions; electromagnetic coupling; gradient methods; linear antenna arrays; phase shift keying; planar antenna arrays; 1D algorithm; 2D algorithm; BPSK; adaptive antenna arrays; adaptive beamforming; adaptive eigen-projection beamforming; antenna beamforming; antenna coupling effects; beam pattern; eigenspace projection algorithm; eigenvalue disparity; gradient projections; linear antenna arrays; planar antenna arrays; smart antennas; Adaptive algorithm; Adaptive arrays; Antenna arrays; Array signal processing; Binary phase shift keying; Convergence; Mutual coupling; Planar arrays; Signal processing algorithms; Two dimensional displays;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2003.811322

Filename

1206466